Started off with the internal referral and after a brief initial chat, I was invited to a technical phone screen, followed by on-site interview; it was 2 coding, 2 system design and 1 behavioral. Coding rounds was 1 medium and 1 hard LC Meta tagged, and system design interviewer was just awesome and asked a lot of creative follow-ups going beyond the traditional "oh what sort of caching mechanism would you build for this". I had a pretty good idea thanks to some mocks on the standard channels, did one on interviewing io and 5-6 system design on prepfully. My recommendation - keep practicing LC hard and a mock interview of each type at Prepfully, and DO NOT underestimate the behavioral coz this did as much for my leveling as the system design ones did.

The loop at Meta has definitely evolved recently. The initial phone screen was standard algorithms. However, the virtual onsite was much more practical than I expected. They still have the architecture and behavioral rounds, but they also included a live coding and debugging session. They want to see if you can actually navigate a messy codebase under time pressure, not just memorize optimal solutions on a blank screen.